National Scam, Inc. sells radio frequency inventory tags. Monthly sales for a seven-month period were as follows: Month Sales (000 units) Feb 19 Mar 18 Apr 15 May 20 Jun 18 Jul 22 Aug 20 Forecast September sales volume using each of the following: a. A linear regression equation (use calculations and verify using Excel Trendline) b. A five month moving average c. Exponential smoothing with a smoothing constant equal to 0.20 assuming a March forecast of 19(000) d. The naive approach e. A weighted average using 0.60 for August, 0.30 for July and 0.10 for June